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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425-717-656-2300 Fax:717-656-2681•www.larcasterIabs.com <br /> Page 4 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1105967 <br /> Reported: 09/07/08 at 12:24 PM <br /> Surrogate Quality Control <br /> LCS 73 <br /> LCSD 92 <br /> Limits: 59-131 <br /> Analysis Name: EPA SW846/8260 (water-25ml) #1 <br /> Batch number: L082341AA <br /> Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene <br /> 5444430 104 90 89 92 <br /> 5444431 102 90 91 87 <br /> 5444432 103 89 91 85 <br /> Blank 104 91 91 86 <br /> LCS 99 86 96 95 <br /> MS 95 86 97 90 <br /> MSD 94 87 97 89 <br /> Limits: 77-114 74-113 77-110 78-110 <br /> *-Outside of specification <br /> (1)The result for one or both determinations was less than five times the LOQ. <br /> (2)The unspiked result was more than four times the spike added. <br />